CVE-2026-22262Network attack vector

Service interruption via dataset stack exhaustion

Published Jan 27, 2026 · Updated Jan 27, 2026

Stack-based buffer overflow in Suricata before 7.0.14 and 8.0.0 through 8.0.2 allows remote attackers to crash the engine. The StringAsBase64 function sizes a variable-length stack buffer from each dataset string before Base64 encoding, so an oversized value exhausts the process stack. Exploitation requires a rule using a dataset save or state option; a successful trigger interrupts network inspection by crashing Suricata.

CVSS severity5.9
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Suricata before 7.0.14 and 8.0.0 through 8.0.2 allows remote attackers to crash the engine. The StringAsBase64 function sizes a variable-length stack buffer from each dataset string before Base64 encoding, so an oversized value exhausts the process stack. Exploitation requires a rule using a dataset save or state option; a successful trigger interrupts network inspection by crashing Suricata.

The record

CVE
CVE-2026-22262
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-787, CWE-121, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.0.14
  2. Affected versionversion=>= 8.0.0, < 8.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 7.0.14; version=>= 8.0.0, < 8.0.3

Published CVSS scores

5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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